A double-duece asswhoopin' is a undeniable defeat handed to one person, or group of persons. It doesn't necessarily apply to fighting. It can apply to just about any sort of contest, be it, a spelling bee, a hockey game, a drinking contest, or anything where one can lose.

Be advised: A double-duece asswhoopin' only applies when the defeat is embarrasingly one-sided

The Sharks laid down the Double-duece asswhoopin' on the Detroit redwings with the 7-0 shut-out game!

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I laid down the Double-duece asswhoopin' in beerpong last night! My opponent left so drunk he couldn't even remember his name, while I actually had to order beer since he didn't once land a ball in a cup. Everyone was laughing their asses off!